First, case preparation is king for .45 acp competition rounds, or any rounds you wish to work consistently. You must cover the lee bulge buster process, since that's the only available solution to Glock fired brass. And, you must talk about cases checkers, as that's the only insurance that finished rounds will run in the pistol. These two issues are what cause the most problems for new .45 shooters and we spend more time at the line, clearing new guys because of these issues than all other stoppage issues combined.

Second, bullet seating seems to be a consistent problem (uncovered by previously mentioned case checkers). The ogive, or other special design of bullets for this round, makes bullet seating critical. OAL is not the issue with this round, but getting the ogive down, into the round far enough to clear the lands is a consistent issue with stoppages among new shooters.

Third, power factor is a place where guidance is useful. We regularly have guys show up at a two day match who are DQed on the first day because their ammunition doesn't make minimum power factor. So, a discussion that is lucid about computing, AND TESTING, power factor would be helpful to lots of people. Also, under this topic, you should talk about matching the pistol spring rates to various PF rounds.

Loads, barrel length, and most of the other stuff you propose to cover are already beaten to death on the web and elsewhere. If you really intend to be helpful, inform people how they can get rounds that are dimensionally functional at a power factor that is legal, which also runs the gun.

Hope this helps.

__________________
That I could be wrong is an eventuality that has not escaped me. I just painted the pictures as I saw them. I do not know how to do anything else. (Saint Elmer, 1955)

I have had problems with shooting Glock-fired .45ACP reloads through my 1911 ... until I get a full-case resizer (Lee). I don't know if it is a "bulge', per se in .45's. At least not as pronounced as in 9mm. But the .45's shot from Glock barrels are definitely wider.

I think this is because the Glock chambers aren't as tight, which allows the case to expand more than other pistol barrels. The more experienced and knowledgeable guys can chime in here to correct me if I am wrong.